Definitions from Wiktionary (hot spot)

▸ noun:  A location which has a higher temperature or amount of radiation than surrounding areas.
▸ noun:  (firefighting, forestry) A part of a forest fire which is burning actively.
▸ noun:  (geology, planetology) The surface manifestation of a plume of molten material that rises from deep in a celestial body's mantle.
▸ noun:  (nuclear physics) An area of high radioactive contamination.
▸ noun:  (optics) Synonym of heiligenschein (“an optical phenomenon which creates a bright spot around the shadow of the viewer's head, when the surface on which the shadow falls has special optical characteristics”)
▸ noun:  An infected lesion in dogs or other furry mammals caused by excessive itching
▸ noun:  (figuratively) A place notable for a high level of activity or danger.
▸ noun:  A dangerous place of violent political unrest.
▸ noun:  A lively and entertaining place, such as a nightclub.
▸ noun:  (computing)
▸ noun:  A part of an application that consumes a significant amount of execution time.
▸ noun:  (graphical user interface) A part of a control (“an interactive interface element”) that responds dynamically as a user moves a pointer over it (for example, a part of an image map that contains a hyperlink which can be clicked on with a cursor).
▸ noun:  (Internet, networking) A location in which Wi-Fi Internet access is available.
▸ noun:  (genetics) The region of a gene in which there is a higher than normal rate of mutation.
▸ noun:  (ecology) Short for biodiversity hotspot (“a place with a significant level of biodiversity, particularly if the flora and fauna are threatened with loss of their habitat”). [(ecology) A place with a significant level of biodiversity, particularly if the flora and fauna are threatened with loss of their habitat.]

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